<script setup>
import { ref } from 'vue'
import { Plus, Upload } from '@element-plus/icons-vue'
// 基于store的数据，初始化imgURL 的初始值
import { useUserStore } from '@/stores'
import { userUpdateAvatarService } from '@/api/user'
const userStore = useUserStore()
const imgUrl = ref(userStore.user.user_pic)
const uploadRef = ref()
const onSelectFile = (uploadFile) => {
  // 基于 fileReader 读取图片做预览
  const reader = new FileReader()
  reader.readAsDataURL(uploadFile.raw)
  reader.onload = (e) => {
    imgUrl.value = e.target.result
  }
}

const onUpdateAvatar = async () => {
  // 发送请求更新头像
  await userUpdateAvatarService(imgUrl.value)
  // 更新头像成功后，通知 userStore 重新渲染
  await userStore.getUser()
  // 提示用户
  ElMessage.success('头像更新成功')
}
</script>
<template>
  <page-container title="更换头像">

    <el-upload
    ref="uploadRef"
    class="avatar-uploader"
    :auto-upload="false"
    :show-file-list="false"
    :on-change="onSelectFile"
  >
    <img v-if="imgUrl" :src="imgUrl" class="avatar" />
    <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
  </el-upload>
  <br />
  <el-button 
    @click="uploadRef.$el.querySelector('input').click()" 
    type="primary"
    :icon="Plus" size="large"

   >选择图片</el-button>
  <el-button 
  type="success" 
  :icon="Upload" size="large"
  @click="onUpdateAvatar"

  >上传头像</el-button>
  </page-container>
</template>

<style lang="scss" scoped>
.avatar-uploader {
  :deep() {
    .avatar {
      width: 300px;
      height: 300px;
      display: block;
    }
    .el-upload {
      border: 1px dashed var(--el-border-color);
      border-radius: 6px;
      cursor: pointer;
      position: relative;
      overflow: hidden;
      transition: var(--el-transition-duration-fast);
    }
    .el-upload:hover {
      border-color: var(--el-color-primary);
    }
    .el-icon.avatar-uploader-icon {
      font-size: 28px;
      color: #8c939d;
      width: 278px;
      height: 278px;
      text-align: center;
    }
  }
}
</style>
